Implement refresh functionality

Test Cases:

1. Added a bunch of items without saving, previously would have to manually refresh page to clear them -- refresh functionality allows them to clear.

2. Filter items by a search term, refresh button renders back the full list of items saved to the database. 
can we use `if` here instead of `unless`?  I can't wrap my head around the `unless` combined with the `||` combined with the `!=`